Pokémon GS Vitro Shiny Odds: 1/4094 and Charm

Shiny odds in Pokémon GS Vitro

The developer FAQ sets the base shiny rate at 1/4094. The Shiny Charm adds two extra rolls. A chain adds one roll for every 10 of the same line, up to 100.

The three rules on the FAQ

Base rate: 1/4094. Shiny Charm, called Amuleto Iris on the Spanish side of the FAQ, sits in the Ruins of Alph and needs every Unown form. It adds two rolls. A chain counts the same species or its evolutionary line: every 10 adds one roll, and 100 is the cap, so ten extra rolls. Beating a different line breaks the chain. An overworld shiny leaves only when you change maps.

Crystal’s rate was about 1/8192. That comparison is from the encyclopedia article on the older game, not from the FAQ.

Calculated with independent rolls: 1 − (4093/4094)^n. One developer source for the inputs; calculations are not an additional source.
Rolls	Setup	Chance	About
1	Base	0.02443%	1/4094
3	Base + Charm	0.07326%	1/1365
11	Base + chain of 100	0.26836%	1/373
13	Base + Charm + chain of 100	0.31707%	1/315

Source status

Reviewed 2 November 2026. Documents from the same publisher count as one source.
Claim	Reading	Status
Base rate, Charm, chains	1/4094; +2 rolls; +1 per 10 through 100	1 developer FAQ
Probability table	Independent-roll calculation	Derived values; not an additional source
Charm puzzle route	—	Not described in the reviewed FAQ

Questions

Is it 1/4096?

The FAQ prints 1/4094 and says that matches the main games. The main games from X and Y use 1/4096. I quote 1/4094 and do not “correct” it.

Where is the charm?

Ruins of Alph, after every Unown form. The FAQ does not give the puzzle route inside the ruins.

Do overworld shinies despawn?

Only when you leave the map, according to the FAQ.

Rare Candy

A different FAQ answer: candies are finite.

Rare Candy →

FAQ

The short form of the same odds.

FAQ →